add http_proxy= lines to test-bad-pull and test-pull

tests/test-bad-pull

@@ -19,7 +19,7 EOF
 
 python dumb.py 2>/dev/null &
 
-hg clone http://localhost:20059/foo copy2
+http_proxy= hg clone http://localhost:20059/foo copy2
 echo $?
 
 kill $!

tests/test-pull

@@ -11,7 +11,7 hg serve -p 20059 > /dev/null &
 sleep 1 # wait for server to be started
 cd ..
 
-hg clone http://localhost:20059/ copy
+http_proxy= hg clone http://localhost:20059/ copy
 cd copy
 hg verify
 hg co